It reduces summer heat buildup prolonging the life of roofing and reduces air conditioner loads.
Attic ventilation requirements canada.
A ridge vent is a ventilation strip that is placed along the ridgeline of the home.
Code requirements the international building code.
Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge.
This cap features both a back draft damper and bird screen preventing outside air from entering the home and birds and small pests from entering duct work.
Attic ventilation serves a number of purposes.
Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.
It is compatible with 3 or 4 ductwork and includes a 3 to 4 adapter for convenience.
The roofing industry also has practical guide lines for attic ventilation.
It is important that air movement occurs and is not impeded by any framing members of the.
The following are the requirements taken directly from the irc.
Of net free area of exhaust needed at or near the ridge.
Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems.
Heat build up the canadian asphalt shingle manufacturers association has issued a bulletin titled proper ventilation for asphalt shingle covered roofs.
Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.
Of net free area of intake needed at or near the soffit.
The rvk1a steel roof cap kit is an the rvk1a steel roof cap kit is an easy to install vent for ventilation fans bath rec room home gym etc.
The majority of the requirements related to attic ventilation have not changed much from the previous editions.
For the 1 150 attic ventilation requirement simply double the amount of exhaust and intake calculated.
Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.
The ventilation amount and opening size requirements can be found in section 806 roof ventilation of chapter 8 roof ceiling construction.
Typically building codes include minimum requirements applicable to attic ventilation.
See the benefits of attic ventilation a new roof is more than just shingles.
Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent.
